Mawson 12Z 300hPa height 1955 - - - - - - - - - - - - 1956 - - - - - - - - - - - - 1957 - - - - - - - - - - - - 1958 - - - - - - - - - - - - 1959 - - - - - - - - - - - - 1960 - - - - - - - - - - - - 1961 - - - - - - - - - - - - 1962 - - - - - - - - - - - - 1963 - - - - - - - - - - - - 1964 - - - - - - - - - - - - 1965 - - - - - - - - - - - - 1966 - - - - - - - - - - - - 1967 - - - - - - - - - 8338.0 8501.4 8562.7 1968 8585.8 8581.2 8514.0 - - - - - - - - - 1969 - - - - - - - - - 8294.7 - - 1970 - - - - - - - - - - 8535.2 8600.7 1971 8751.6 8648.9 8494.5 - - - - - - 8291.0 8441.4 8673.5 1972 8692.4 8571.7 8475.9 - - - - - - 8317.4 8392.1 8659.3 1973 8636.6 8556.7 8393.3 - - - - - - 8280.0 8407.2 8484.2 1974 8610.0 8563.6 8431.0 8425.7 8342.7 8321.1 8279.0 8341.3 8199.7 8314.2 8461.4 8672.7 1975 8635.2 8589.2 8498.1 - - - - - - 8252.9 8409.7 8558.3 1976 - - - - - - - - - 8185.0 8501.9 8732.1 1977 8668.4 8547.6 8438.7 - - - - - - 8369.1 8416.4 8513.9 1978 8518.6 8598.8 - - - - - - - - - - 1979 - - 8396.8 8474.1 8278.7 8181.7 8133.3 8149.7 8193.6 8292.3 8535.4 8618.4 1980 8643.5 8601.2 8516.0 8457.4 8356.6 8240.0 8337.9 8285.8 8287.1 8234.3 8476.0 8579.7 1981 8595.7 8599.6 8512.9 8387.6 8310.7 8249.3 8386.8 8328.7 8255.7 8239.0 8410.7 8589.0 1982 8601.9 8546.2 8379.0 8280.3 8283.5 8227.6 8178.7 8168.9 8134.3 8250.0 8527.2 8702.9 1983 8622.6 8527.9 8456.7 8346.0 8333.0 8281.4 8210.3 8173.7 8262.7 8265.7 8331.3 8461.0 1984 8601.6 8555.5 8464.3 8359.3 8449.3 8221.3 8154.8 8268.3 8212.7 8198.1 8411.8 8665.0 1985 8687.0 8523.2 8432.3 8432.7 8293.3 8385.3 8164.0 8172.6 8188.7 8217.4 8332.0 8491.0 1986 8616.5 8653.9 8545.9 8344.7 8339.3 8281.4 8173.9 8199.0 8166.4 8238.4 8422.3 8498.1 1987 8652.9 8554.3 8465.5 8412.7 8300.6 8324.7 8268.0 8074.3 8153.0 8259.7 8427.3 8540.0 1988 8645.3 8507.7 8480.7 8356.2 8385.5 8387.0 8170.5 8184.3 8301.9 8401.1 8421.6 8549.7 1989 - - - - - - - - - - - - 1990 - - - - - - - - - - - - 1991 - - - - - 8363.0 8368.5 8255.0 8230.0 8231.5 8463.3 8739.4 1992 8610.6 8598.3 8505.7 8472.1 8494.5 8456.8 8197.9 8160.0 8114.8 8280.0 8401.2 8530.0 1993 8667.7 8538.5 8443.9 8345.6 8233.8 8248.4 8207.5 8183.5 8237.7 8305.9 8377.5 8500.8 1994 8541.9 8510.0 8401.2 8407.6 8333.9 8469.0 8316.3 8187.0 8223.4 8271.6 8480.6 8506.4 1995 8568.9 8608.1 8457.9 8448.1 8290.7 8246.1 8364.4 8233.9 8075.8 - - 8568.2 1996 8611.2 8606.7 8441.7 8401.5 8259.2 8371.6 8335.2 8290.3 8436.0 8301.1 8489.2 8568.8 1997 8610.2 8556.2 8388.1 8421.0 8295.1 8370.5 8154.2 8217.8 8142.1 8270.6 8498.1 8622.0 1998 8585.1 8518.1 8479.9 8255.8 8310.9 8310.2 8240.0 8160.1 8281.8 8275.8 8381.1 8493.4 1999 8600.6 8528.0 8422.4 8229.7 8295.9 8432.6 8167.7 8213.9 8273.3 8170.7 8392.2 8399.5 2000 8497.1 8491.1 8378.4 8415.2 8240.1 8405.7 8257.0 8253.9 8310.0 8225.7 8484.6 8629.3 2001 8602.1 8588.2 8466.2 8317.7 8372.6 8304.7 8316.4 8146.1 8167.2 8261.3 8351.7 8468.2 2002 8560.7 8504.2 8517.4 8432.7 8488.6 8332.7 8333.1 8205.5 8256.7 8464.6 8421.9 8514.9 2003 8680.7 8578.1 8460.4 8351.0 8319.8 8319.7 8254.9 8200.1 8218.4 8260.0 8456.9 8642.6 2004 8610.0 8665.4 8423.1 8369.2 8319.2 8252.5 8123.3 8127.9 8151.3 8331.2 8407.7 - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - 8477.3 8360.9 8216.3 8294.1 8136.5 8248.6 8170.5 8351.6 8500.9 2009 8626.0 8576.0 8488.6 8381.6 8369.8 8531.7 8310.3 8269.7 8271.4 8313.4 8482.7 8553.6 2010 8689.9 8651.2 8464.5 8353.7 8265.7 8158.4 8097.3 8119.1 8256.9 8259.1 8412.4 8533.5 2011 8719.7 8549.5 8438.9 8466.0 8316.1 8434.0 8332.2 8320.2 8272.2 8279.3 8504.2 8475.9 2012 8498.1 8575.3 8402.4 8359.1 8322.4 8263.4 8204.2 8253.9 8173.9 8318.1 8520.0 8644.2 2013 8616.0 8542.2 8413.2 8347.6 8233.6 8381.2 8223.9 8360.0 8354.2 8345.4 8541.8 8582.9 2014 8618.2 8556.8 8472.5 8296.3 8403.9 8311.1 8239.3 8196.5 8299.8 8290.0 8435.0 8485.2 2015 8585.6 8481.9 8404.8 8288.6 8324.8 8267.1 8190.4 8167.6 8187.4 8355.0 8432.8 8552.2 2016 8521.6 8529.4 8436.5 8356.0 8297.7 8234.6 8188.4 8345.9 - - 8585.5 8546.5 2017 8670.6 8529.4 8420.8 8287.7 8337.4 8237.2 8299.2 8121.9 8206.9 8318.6 8471.9 8526.8 2018 8715.5 8558.3 8527.3 8480.0 8271.2 8463.1 8215.8 8265.7 8150.0 - 8398.7 8581.3 2019 8631.8 8613.3 8482.0 8440.0 8347.3 8306.0 8255.3 8187.4 8165.0 8460.0 8555.0 8730.0 2020 8638.7 8535.7 8505.4 8430.8 8356.4 8344.4 8327.1 8260.0 8210.0 8311.4 8487.1 8512.2 2021 8534.5 8463.1 8493.3 8359.4 8248.0 8220.0 8242.0 8209.2 8220.9 8248.5 8416.2 8488.9 2022 8622.9 - 8458.0 8372.2 8295.0 8343.6 8261.1 8252.4 8105.3 8288.0 8354.0 8432.7 2023 8467.1 8545.6 8613.6 8435.0 8373.5 8268.2 8242.0 8221.7 8255.0 8305.9 8383.2 8561.7 2024 8571.7 8574.0 8433.2 8367.5 - - - - - - - -